Macklemore performs during the Grammy Nominations Concert at the Nokia Theatre in Los Angeles on December 6, 2013. The 56th Annual Grammy Awards will be broadcast live from Los Angeles on January 26, 2014. (Photo credit ROBYN BECK/AFP/Getty Images)

Macklemore performs during the Grammy Nominations Concert at the Nokia Theatre in Los Angeles on December 6, 2013. The 56th Annual Grammy Awards will be broadcast live from Los Angeles on January 26, 2014. (Photo credit ROBYN BECK/AFP/Getty Images)

Robin Thicke performs with Verdine White (L) and T.I. (R) during the Grammy Nominations Concert at the Nokia Theatre in Los Angeles on December 6, 2013. The 56th Annual Grammy Awards will be broadcast live from Los Angeles on January 26, 2014. (Photo credit ROBYN BECK/AFP/Getty Images)

Robin Thicke and Verdine White (L) and T.I. (R) perform during the Grammy Nominations Concert at the Nokia Theatre in Los Angeles on December 6, 2013. The 56th Annual Grammy Awards will be broadcast live from Los Angeles on January 26, 2014. (Photo credit ROBYN BECK/AFP/Getty Images)

Miguel performs at the The Grammy Nominations Concert Live!! at the Nokia Theatre at LA Live in Los Angeles, California December 6, 2013. The 56th Annual Grammy Awards will be broadcast live from the Staples Center in Los Angeles on January 26, 2014. (Photo credit ROBYN BECK/AFP/Getty Images)

Keith Urban performs at the The Grammy Nominations Concert Live!! at the Nokia Theatre at LA Live in Los Angeles, California December 6, 2013. The 56th Annual Grammy Awards will be broadcast live from the Staples Center in Los Angeles on January 26, 2014. (Photo credit ROBYN BECK/AFP/Getty Images)

Ed Sheeran announces the nominees for the Best Pop Duo/Group Performance at the The Grammy Nominations Concert Live!! at the Nokia Theatre at LA Live in Los Angeles, California December 6, 2013. The 56th Annual Grammy Awards will be broadcast live from the Staples Center in Los Angeles on January. 26, 2014. (Photo credit ROBYN BECK/AFP/Getty Images)

Arsenio Hall speaks at the The Grammy Nominations Concert Live!! at the Nokia Theatre at LA Live in Los Angeles, California December 6, 2013. The 56th Annual Grammy Awards will be broadcast live from the Staples Center in Los Angeles on January 26, 2014. (Photo credit ROBYN BECK/AFP/Getty Images)